How to scan a car and what does the scanner tells you after the diagnostic test?

 
To scan the car, there is a 16 pin connector also called OBD II socket under the steering wheel. The scanner has a 16 pin connector which will be connected to the socket and then depending on the connection options like wireless or wired connection. The connector will be linked with the scanner and then using the software inside the scanner will read the DTC (Diagnostic Trouble Code) stored in the memory of ECM (Electronic Control Module) of the car. Whenever there is problem in a car, the problem is detected by the dedicated system provided for that particular system. After the detection of the trouble the ECM generates a DTC code and stores it in its memory and that code remains in the system until and unless it is removed or deleted using any scanner.     WhatsApp Image 2018-07-18 at 4.45.00 PM   So after the diagnostic test the DTC stored in the ECM and that is read by the scanner and the DTC codes are displayed in the scanner. Now, the mechanic has to only check the specific system of the car or the specific component which is shown in DTC and after the repairing that specific component, the mechanic can clear the DTC from the car. This is the simple procedure to diagnose and repair a car using a scanner.

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